Preparation and Characterization of Cu₂ZnSnS₄ Thin Films and Solar Cells Fabricated from Quaternary Cu-Zn-Sn-S Target

Figure 2

XPS spectra of sputtered films: (a) surveyscan; (b) core-level spectrum for Cu 2p; (c) core-level spectrum for Zn 2p; (d) core-level spectrum for Sn 3d; (e) core-level spectrum for S 2p.

(a)

(b)

(c)

(d)

(e)